Vibratory Tumbler

64X2 said

When I worked at a diesel shop they had a industrial tumbler, they used a type of cutting fluid and small grey triangular stone, it cleaned the snot out of the metal thrown in. We used it to refurbish antique diesel injectors, we also had a blackening process......

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Like a heavy solvent? Kerosene type oil? :)
I gotta look up cutting oil.
Those industrial tumblers are sooo expensive. I reckon a big haus tumbler would work way better than this little vibrating turd I have.

One of my tests will use denatured alcohol since it wont harm the vibrators plastic bowl I dont think, and it is not made of bases or acids so it may be more easy to work with and disposal of waste products wont require as much work.